Determining a return laser signal associated with a target in laser range finders

a laser signal and target technology, applied in the field of laser range finders, can solve problems such as inaccuracy in selecting the return laser signal associated with the targ

Active Publication Date: 2017-12-26
BAE SYST INFORMATION & ELECTRONICS SYST INTEGRATION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The system provides accurate identification of the return laser signal associated with the target by using a dynamic thresholding module that accounts for varying conditions, ensuring precise selection and display of the correct amplitude.

Problems solved by technology

However, these approaches may result in an inaccurate selection of the return laser signal associated with the target.

Method used

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  • Determining a return laser signal associated with a target in laser range finders
  • Determining a return laser signal associated with a target in laser range finders
  • Determining a return laser signal associated with a target in laser range finders

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Embodiment Construction

[0016]The exemplary embodiments described herein in detail for illustrative purposes are subject to many variations in structure and design. The present technique determines accurate amplitude of each return laser signal and then determines or identifies a likely return laser signal associated with a target, in a laser range finder (LRF), using a range varying threshold that accounts for both range and atmospheric losses. According to the present technique, by using multiple analog to digital (A / D) converters positioned in a receiver circuit of the LRF, a full dynamic range can be covered resulting in accurate determination of amplitude of the return laser signals. Further, by using the range varying threshold, the return laser signals can then be compared on a signal by signal basis and the likely return laser signal associated with the target is determined.

[0017]FIG. 1 is a block diagram 100 of a laser range finder (LRF) 102 for determining a return laser signal associated with a ...

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Abstract

A laser range finder (LRF) and an automated method for determining a return laser signal associated with a target thereof are disclosed. In one example embodiment, the LRF includes a laser beam emitter to emit a laser beam towards a target. Further, the LRF includes a receiver circuit to receive multiple return laser signals reflected from objects including the target and to determine an amplitude of each of the multiple return laser signals. Furthermore, the LRF includes a processor coupled to the receiver circuit to compare the amplitude of each of the multiple return laser signals with a range varying threshold that accounts for range and atmospheric losses and to determine one of the multiple return laser signals as being associated with the target based on the comparison.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This Application claims rights under 35 USC §119(e) from U.S. Application 61 / 909,630 filed Nov. 27, 2013, the contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]Field of the Invention[0003]The present invention relates to laser range finders and more particularly to determining a return laser signal associated with a target in the laser range finders.[0004]Brief Description of Related Art[0005]A typical laser range finder (LRF) emits a laser beam towards a target and receives multiple return laser signals with a leading edge crossing a threshold value. Further, the LRF determines crude amplitude of each return laser signal and displays the crude amplitude of the return laser signals for a user to select the return laser signal associated with the target. Further, the user may select one of the return laser signals as being associated with the target based on heuristic approaches. However, these approac...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): G01C3/08G01S7/489G01S7/487G01S17/08G01S7/497
CPCG01C3/08G01S7/489G01S17/08G01S7/4873G01S7/497
InventorCHOINIERE, MICHAEL J.DEGTIAREV, EGOR V.GAUSCH, ERIC C.JANIAK, DEREK P.
OwnerBAE SYST INFORMATION & ELECTRONICS SYST INTEGRATION INC